ISSN:
1572-8927
Keywords:
Vapor pressure
;
dimerization constant
;
hydrophobic association
;
benzene
;
fluorobenzene
;
benzyl alcohol
;
phenethyl alcohol
;
dilute aqueous solutions
Source:
Springer Online Journal Archives 1860-2000
Topics:
Chemistry and Pharmacology
Notes:
Abstract Vapor pressure measurements have been made on dilute aqueous solutions of benzene-benzyl alcohol (BZOH), benzene-phenethyl alcohol (PEOH), and fluorobenzene-BZOH at 15, 25, 35, and 45°C. The benzene results have been interpreted with a mass action model which attributes deviations from ideality to the formation of benzene dimers and heterodimers with BZOH and PEOH. The benzene heterodimers form endothermically at 25°C with large and negative heat capacity changes. The dimerization constant for the benzene-BZOH dimer reaches a maximum of 0.57 M−1 at about 37°C, while the benzene-PEOH dimer reaches a maximum of 0.60 M−1 around 30°C. The fluorobenzene results have been interpreted with a mass action model which, in addition to fluorobenzene dimers and heterodimers, includes the formation of a fluorobenzene-BZOH trimer. Thermodynamic properties for these aggregates are reported and compared with results obtained in previous studies.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00645197
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